What value of a would make the expression a(x+3) equivalent to 7x+21 ?(1 point)

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1 answer

To find the value of a, you need to equate the given expression to the equivalent expression and solve for a.

a(x+3) = 7x + 21

To eliminate the parentheses, you can distribute a to both x and 3:

ax + 3a = 7x + 21

Now, you can equate the coefficients of x on both sides of the equation:

a = 7

Therefore, the value of a that would make the expression a(x+3) equivalent to 7x+21 is a = 7.